9 of the world's greatest tunnels
Work on the tunnel started in 1964 and was completed in 1988. Length: 53 kilometers (32.9 miles) Fast fact: In 1976, construction workers hit a patch of soft rock and water gushed into the tunnel at a rate of 80 tons per minute. The leak took two months to ...
Tesla Roadster Breaks EV World Record: 313 Miles on Single Charge (501 KM)
6 km), with the car showing 38 miles (61 km) left on the battery. The Tesla's 53 kWh lithium-ion battery was rated at 244 miles with the EPA's methodology. Above: "The security seal was applied to the charge port door when we started the journey.
World human powered speed record - 53.43 miles in an hour
July 6, 2006 The world one hour record for human powered vehicles was broken early on the morning of July 2 when "Fast Freddy" Markham pedalled 53 ... miles), German Lars Teutenberg (PB 51 miles), and Slovenian Damjan Zabovnik (current European flying ...
What is an astronomical unit?
For general reference, we can say that one astronomical unit (AU) represents the mean distance between the Earth and our sun. The AU is approximately 150 million kilometers or 93 million miles. It is approximately 8 light-minutes. More exactly, one ...
How Big is Mars? | Size of Planet Mars
Mars is about half (53 percent) the size of Earth ... At its equator, Mars has a diameter of 4,222 miles (6,794 km), but from pole to pole, the diameter is 4,196 miles (6,752 km). Mars’ radius is, of course, half of planet’s diameter.